fix: resolve elemental mana conversion pause bug (#348)

Two root causes fixed:
1. gameStore.ts: computeRegen now receives actual attunements instead of empty {}, so rawGrossRegen includes attunement contributions (was ~2/hr, now correct 3000+/hr)
2. gameStore.ts buildConversionParams: use rawManaRegen with level scaling (1.5^(level-1)) instead of conversionRate for per-element grossRegen
3. LeftPanel.tsx: same grossRegen fix + include attunement regen in rawGrossRegen display
4. ElementStatsSection.tsx: same grossRegen fix
5. useGameDerived.ts: pass actual attunements to computeRegen for baseRegen calculation

Added regression test: conversion-pause-bug-regression.test.ts (7 tests)

src/app/components/LeftPanel.tsx

@@ -15,7 +15,7 @@ import { computeTotalMaxMana, computeTotalRegen, computeTotalClickMana } from '@
 import { computeDisciplineEffects } from '@/lib/game/effects/discipline-effects';
 import { computeConversionRates } from '@/lib/game/utils/conversion-rates';
 import { getGuardianForFloor } from '@/lib/game/data/guardian-encounters';
-import { ATTUNEMENTS_DEF } from '@/lib/game/data/attunements';
+import { ATTUNEMENTS_DEF, getTotalAttunementRegen } from '@/lib/game/data/attunements';
 import type { ElementRegenBreakdown } from '@/components/game/ManaDisplay';
 
 export function LeftPanel() {
@@ -80,12 +80,15 @@ export function LeftPanel() {
     for (const [id, state] of Object.entries(attunements)) {
       if (!state.active) continue;
       const def = ATTUNEMENTS_DEF[id];
-      if (def?.primaryManaType) {
+      if (def?.primaryManaType && def.rawManaRegen) {
+        const levelMult = Math.pow(1.5, (state.level || 1) - 1);
         grossRegen[def.primaryManaType] = (grossRegen[def.primaryManaType] || 0)
-          + (def.conversionRate || 0);
+          + def.rawManaRegen * levelMult;
       }
     }
     const invokerLevel = attunements.invoker?.active ? (attunements.invoker.level || 1) : 0;
+    const attunementRegen = getTotalAttunementRegen(attunements);
+    const totalRawGrossRegen = baseRegen + attunementRegen;
     const conversionResult = computeConversionRates({
       disciplineEffects,
       attunements,
@@ -94,7 +97,7 @@ export function LeftPanel() {
       invokerLevel,
       meditationMultiplier,
       grossRegen,
-      rawGrossRegen: baseRegen,
+      rawGrossRegen: totalRawGrossRegen,
     });
     const breakdown: Record<string, ElementRegenBreakdown> = {};
     for (const [elem, entry] of Object.entries(conversionResult.rates)) {